Passiflora ‘Purple Giant’ is a striking cultivar in the passionflower family (Passifloraceae) and is well-loved for its vibrant, deep purple, bright green and white blooms. It’s commonly grown for both its ornamental value and for fruit production. The ‘Purple Giant’ variety is a cultivated hybrid within the Passiflora genus, which includes hundreds of species native to tropical and subtropical regions, particularly in South America.

The taste of the fruit is typically sweet-tart with tropical undertones. Some say it’s less acidic but still has that characteristic passionfruit flavour, making it enjoyable for fresh consumption or in desserts and drinks.

Growing from Seed

Growing Passiflora from seed requires a bit of patience, as passionflower seeds can be slow and irregular in germination. However, with the right conditions and care, you can successfully cultivate these beautiful plants.

Seed Preparation:

Scarify the seeds to encourage germination. You can do this by lightly rubbing them with sandpaper or a nail file, or nicking them with a small knife. Soak the seeds in warm water for 12–24 hours to soften the seed coat. This can help speed up the germination process. We can send you a small nail file to use, just ask us in the comments when you check out.

Soil:

Use a well-draining potting mix, ideally one that’s rich in organic matter. A mix of peat, sand, and a bit of compost or perlite works well. Maintain a soil pH of 6.0–7.0, as passionflowers prefer slightly acidic to neutral soil.

Planting:

Plant seeds about 1 cm deep in the soil mix, covering them lightly. Space seeds if you’re planting multiple; aim for about 10 cm apart to avoid crowding.

Germination Conditions:

Place the pots in a warm spot, ideally around 20–25°C. Keep the soil consistently moist but not waterlogged. You can cover the pots with plastic wrap to retain humidity, but make sure there’s some airflow to prevent mould.

Light:

Seeds germinate best in bright, indirect light. Once they sprout, move seedlings to a sunnier location. Seedlings benefit from about 6 hours of sunlight daily once they’re established.

Timeframe:

Passionflower seeds can take anywhere from 1 to 4 months to germinate, so be patient. Please do not be too hasty to discard seeds that do not germinate; seeds will often lay dormant until the conditions are similar to their natural germination requirements.

Transplanting:

Once the seedlings have a few sets of true leaves and are strong enough, they can be transplanted into larger pots or directly into the garden. Choose a spot with well-draining soil and a structure, such as a trellis, as ‘Red Flamenco’ is a climbing plant and will need support.

Care and Maintenance
Watering: Keep the soil consistently moist, especially in warmer weather, but avoid water logging.

Fertiliser: Feed every 4–6 weeks during the growing season with a balanced, slow-release fertiliser.

Pruning: Trim back overgrown or dead parts to encourage fresh growth and flowering.